The primary air is discharged through nozzles into the mixing chamber; as a result of this, secondary air (room air) is induced via the induced air grille and passes through the horizontal heat exchanger.

Primary and secondary air mix and are then supplied to the room horizontally through the supply air grille.

Nominal length

900, 1200, 1500 mm

Length

948, 1248, 1548 mm

Width

550, 614 mm

Height

200 mm (plus induced air grille)

Primary air spigot, diameter

158 mm

Primary air volume flow rate

10 – 78 l/s or 36 – 281 m³/h

Cooling capacity

Up to 1730 W

Heating capacity

Up to 1480 W

Max. operating pressure, water side

6 bar

Max. operating temperature

75 °C

The quick sizing table contains operating points for defined reference units. For other operating points you may use the Easy Product Finder design software.

Quick sizing – heat exchanger width 256 mm

LN

①

Primary air

②

Cooling

Heating

LN

①

VPr

Δpt

LWA

2-pipe and 4-pipe systems

4-pipe system

LN

①

VPr

Δpt

LWA

Qtot

QWK

ΔtW

Δpw

QWH = Qtot

ΔtW

Δpw

LN

①

l/s

m³/h

Pa

dB(A)

W

K

kPa

W

kPa

900

G

7

25

38

<20

262

178

1.4

1.4

313

2.4

0.5

900

G

12

43

111

<20

507

363

2.8

1.4

658

5.1

0.5

900

G

17

61

224

29

673

468

3.7

1.4

863

6.7

0.5

900

U

13

47

40

<20

470

314

2.5

1.4

565

4.4

0.5

900

U

21

76

105

20

692

439

3.4

1.4

805

6.3

0.5

900

U

29

104

200

30

865

515

4.0

1.4

958

7.5

0.5

900

2U

25

90

38

<20

622

320

2.5

1.4

577

4.5

0.5

900

2U

41

148

103

26

957

457

3.6

1.4

842

6.6

0.5

900

2U

57

205

200

36

1227

540

4.2

1.4

1007

7.9

0.5

1200

G

9

32

35

<20

323

214

1.7

1.7

380

3.0

0.6

1200

G

15

54

98

<20

617

437

3.4

1.7

801

6.3

0.6

1200

G

21

76

192

28

815

561

4.4

1.7

1052

8.7

0.6

1200

U

17

61

39

<20

600

395

3.1

1.7

721

5.6

0.6

1200

U

28

101

106

22

891

553

4.3

1.7

1035

8.1

0.6

1200

U

39

140

206

32

1116

646

5.1

1.7

1227

9.6

0.6

1200

2U

33

119

39

<20

804

406

3.7

1.7

742

5.8

0.6

1200

2U

54

194

104

30

1273

572

4.5

1.7

1073

8.4

0.6

1200

2U

75

270

200

40

1573

668

5.2

1.7

1275

10.0

0.6

1500

G

12

43

40

<20

444

299

2.3

2.1

537

4.2

0.7

1500

G

20

72

117

21

793

552

4.3

2.1

1033

8.1

0.7

1500

G

28

101

220

31

1028

690

5.4

2.1

1321

10.3

0.7

1500

U

21

76

38

<20

724

471

3.7

2.1

869

6.8

0.7

1500

U

35

126

107

24

1078

656

5.1

2.1

1249

9.8

0.7

1500

U

49

176

210

34

1352

761

5.9

2.1

1474

11.5

0.7

1500

2U

41

144

40

21

981

486

3.8

2.1

900

7.0

0.7

1500

2U

60

216

85

32

1358

635

5.0

2.1

1204

9.4

0.7

1500

2U

80

288

152

41

1699

734

5.7

2.1

1416

11.1

0.7

① Nozzle variant ② Air-regenerated noise

Quick sizing – heat exchanger width 320 mm

LN

①

Primary air

②

Cooling

Heating

LN

①

VPr

Δpt

LWA

2-pipe and 4-pipe systems

4-pipe system

LN

①

VPr

Δpt

LWA

Qtot

QWK

ΔtW

Δpw

QWH = Qtot

ΔtW

Δpw

LN

①

l/s

m³/h

Pa

dB(A)

W

K

kPa

W

kPa

900

G

7

25

38

<20

284

199

1.6

1.6

337

2.6

0.5

900

G

12

43

111

<20

548

403

3.2

1.6

705

5.5

0.5

900

G

17

61

224

29

722

517

4.0

1.6

923

7.2

0.5

900

U

13

47

40

<20

506

349

2.7

1.6

606

4.7

0.5

900

U

21

76

105

20

739

485

3.8

1.6

862

6.7

0.5

900

U

29

104

200

30

918

568

4.4

1.6

1073

8.0

0.5

900

2U

25

90

38

<20

658

357

2.8

1.6

619

4.8

0.5

900

2U

41

148

103

26

1000

506

4.0

1.6

901

7.0

0.5

900

2U

57

205

200

36

1281

594

4.6

1.6

1076

8.4

0.5

1200

G

9

32

35

<20

349

240

1.9

2.2

409

3.2

0.6

1200

G

15

54

98

<20

664

483

3.8

2.2

858

6.7

0.6

1200

G

21

76

192

28

871

617

4.8

2.2

1123

8.8

0.6

1200

U

17

61

39

<20

643

438

3.4

2.2

772

6.0

0.6

1200

U

28

101

106

22

946

609

4.8

2.2

1105

8.6

0.6

1200

U

39

140

206

32

1178

707

5.5

2.2

1308

10.2

0.6

1200

2U

33

119

39

<20

849

451

3.5

2.2

795

6.2

0.6

1200

2U

54

194

104

30

1780

628

4.9

2.2

1145

9.0

0.6

1200

2U

75

270

200

40

1636

731

5.7

2.2

1358

10.6

0.6

1500

G

12

43

40

<20

478

333

2.6

2.7

577

4.5

0.7

1500

G

20

72

117

21

849

608

4.8

2.7

1103

8.6

0.7

1500

G

28

101

220

31

1092

754

5.9

2.7

1406

11.0

0.7

1500

U

21

76

38

<20

774

520

4.1

2.7

930

7.3

0.7

1500

U

35

126

107

24

1140

718

5.6

2.7

1330

10.4

0.7

1500

U

49

176

210

34

1420

829

6.5

2.7

1567

12.2

0.7

1500

2U

41

144

40

21

1031

537

4.2

2.7

962

7.5

0.7

1500

2U

60

216

85

32

1419

696

5.4

2.7

1283

10.0

0.7

1500

2U

80

288

152

41

1765

800

6.3

2.7

1505

11.8

0.7

① Nozzle variant ② Air-regenerated noise

Reference values

Parameter

Cooling

Heating

tR

26 °C

22 °C

tPr

16 °C

22 °C

tWV

16 °C

50 °C

VW

110 l/h

110 l/h

Active chilled beams of Type DID-E, with one-way air discharge and high thermal output, providing high thermal comfort levels.

For installation into ceiling bulkheads, preferably in rooms with a height up to 4.00 m.

The units consist of a casing with suspension points, a spigot, non-combustible nozzles, and a horizontal heat exchanger.

Three nozzle variants to optimise induction based on demand.

Special characteristics

Choice of any induced air grille and supply air grille from our portfolio

One-way air discharge

Horizontal heat exchanger as 2-pipe or 4-pipe system

Internal nozzle plate with punched nozzles (non-combustible)

Water connections at the narrow side, Ø12 mm Cu pipe, with plain tails or with G½" external thread, or with a G½" union nut; with flat seal

Materials and surfaces

Casing and nozzle plate made of galvanised sheet steel

Heat exchanger with copper tubes and aluminium fins

Casing, primary air spigot, etc., either galvanised or in black (RAL 9005)

Heat exchanger also in black (RAL 9005)

Optional induced air spigot (IS) and supply air spigot (AS) made of galvanised sheet steel; black (RAL 9005) as an option

Technical data

Nominal length: 900, 1200, 1500 mm

Length: 948, 1248, 1548 mm

Height: 200 mm (plus induced air grille)

Width: 550, 614 mm

Primary air spigot, diameter: 158 mm

Primary air volume flow rate: 10 – 78 l/s or 36 – 281 m³/h

Cooling capacity: up to 1730 W

Heating capacity: up to 1480 W

Max. operating pressure: 6 bar

Max. operating temperature: 75 °C

Sizing data

Primary air

V _______________________ [m³/h]

Δpt _______________________ [Pa]

Air-regenerated noise

LWA _______________________ [dB(A)]

Cooling

Qges _______________________ [W]

Heating

Qges _______________________ [W]

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

Heat exchangers are fitted with water flow and water return connections at the narrow side

Induced and supply air spigots (accessories) facilitate mounting the grilles (an installation subframe for the concealed screw fixing is not required)

If the cover for the induced air opening is provided by others, e.g. with a perforated plate, that plate must have a free area of at least 65 %.

Schematic illustration of mixed flow ventilation

LN [mm]

Nominal length

LWA [dB(A)]

Sound power level

tPr [°C]

Primary air temperature

tWV [C°]

Water flow temperature – cooling/heating

tR [C°]

Room temperature

tR [C°]

Room temperature

tAN [C°]

Secondary air intake temperature

QPr [W]

Thermal output – primary air

Qtot [W]

Thermal output – total

QW [W]

Thermal output – water side, cooling/heating

VPr [l/s]

Primary air volume flow rate

VPr [m³/h]

Primary air volume flow rate

VW [l/h]

Water flow rate – cooling/heating

V [l/h]

Volume flow rate

∆tW [K]

Temperature difference – water

∆pW [kPa]

Pressure drop, water side

∆pt [Pa]

Total pressure drop, air side

∆tPr = tPr - tR [K]

Difference between primary air temperature and room temperature

∆tRWV = tWV - tR [K]

Difference between water flow temperature and room temperature

∆tWm-Ref [K]

Difference between mean water temperature and reference temperature

LN [mm]

Nominal length

Mixed flow

The supply air is discharged from the diffuser into the space with a velocity between 2 and 5 m/s. The resulting air jet mixes with the room air, ventilating the entire space. Mixed flow systems typically provide a uniform temperature distribution and air quality within the space. The originally high velocity of the turbulent air jet decreases rapidly due to the high induction levels of mixed flow systems.

Heat exchanger

The maximum water-side operating pressure for all heat exchangers is 6 bar.

The maximum water flow temperature (heating circuit) for all heat exchangers is 75 °C; if flexible hoses are used, the water flow temperature should not exceed 55 °C. Units for other pressures and temperatures are available on request.

The water flow temperature (cooling circuit) should be at least 16 °C such that it does not permanently fall below the dew point. For units with a condensate drip tray the water flow temperature may be reduced to 15 °C.

Heat exchanger as 2-pipe system

Air-water systems with a 2-pipe heat exchanger may be used for either heating or cooling. In changeover mode it is possible to use all units within a water circuit exclusively for cooling in summer and exclusively for heating in winter.

Heat exchanger as 4-pipe system

Air-water systems with a 4-pipe heat exchanger may be used for both heating and cooling. Depending on the season, i.e. especially in spring and autumn, it may be possible that an office has to be heated in the morning and cooled in the afternoon.

Your message is send and will be processed shortly.Our department for Service-Requests will contact you asap.For general question regarding products or services you can also call:Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051

Your message is send and will be processed shortly.Our department for Service-Requests will contact you asap.For general question regarding products or services you can also call:Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051